A novel adsorbent of magnetic graphene oxide/chitosan (MGOC) composite has been prepared via chemical cross-linking method, and exhibits an extraordinary sorption capacity (about 59.82 mg/g) towards cobalt ions. The batch experiments revealed that MGOC is weakly affected by ionic strength and pH-dependent for cobalt ions sorption. The sorption process is spontaneous and endothermic according to thermodynamic parameters, following the pseudo-second-order model. In view of low price, high adsorption capacity, great saturation magnetization and perfect reusability, the MGOC composite maybe has a potential value in treatment of radiocobalt-containing wastewater.

中文翻译：

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用于去除水溶液中放射性钴的磁性氧化石墨烯/壳聚糖复合材料的制备与评价

通过化学交联方法制备了一种新型磁性氧化石墨烯/壳聚糖 (MGOC) 复合材料吸附剂，对钴离子表现出非凡的吸附能力（约 59.82 mg/g）。批量实验表明，MGOC 受离子强度和钴离子吸附的 pH 依赖性影响很小。根据热力学参数，吸附过程是自发和吸热的，遵循伪二阶模型。MGOC复合材料具有价格低廉、吸附容量大、饱和磁化强度大、可重复使用等优点，在含放射性钴废水的处理中具有潜在的应用价值。